Fix BluetoothUpdateWorkerTest.

Should avoid spying on Android classes due to potential test pollution: https://robolectric.org/best-practices/

Bug: 315399487

Test: atest SettingsRoboTests:com.android.settings.homepage.contextualcards.slices --iterations 20
Change-Id: Ia52baf52bf43d3a3959dc0234fbfc5b4a4575dac
diff --git a/src/com/android/settings/slices/SliceBackgroundWorker.java b/src/com/android/settings/slices/SliceBackgroundWorker.java
index 2b02999..5145f18 100644
--- a/src/com/android/settings/slices/SliceBackgroundWorker.java
+++ b/src/com/android/settings/slices/SliceBackgroundWorker.java
@@ -29,6 +29,8 @@
 import android.util.ArrayMap;
 import android.util.Log;
 
+import androidx.annotation.VisibleForTesting;
+
 import java.io.Closeable;
 import java.io.IOException;
 import java.lang.reflect.InvocationTargetException;
@@ -172,7 +174,8 @@
     /**
      * Notify that data was updated and attempt to sync changes to the Slice.
      */
-    protected final void notifySliceChange() {
+    @VisibleForTesting
+    public final void notifySliceChange() {
         NotifySliceChangeHandler.getInstance().updateSlice(this);
     }
 
diff --git a/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/BluetoothUpdateWorkerTest.java b/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/BluetoothUpdateWorkerTest.java
index f306693..43630e8 100644
--- a/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/BluetoothUpdateWorkerTest.java
+++ b/tests/robotests/src/com/android/settings/homepage/contextualcards/slices/BluetoothUpdateWorkerTest.java
@@ -16,12 +16,9 @@
 
 package com.android.settings.homepage.contextualcards.slices;
 
-import static org.mockito.Mockito.doReturn;
-import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 
-import android.content.ContentResolver;
 import android.content.Context;
 import android.net.Uri;
 
@@ -29,7 +26,6 @@
 import com.android.settings.testutils.shadow.ShadowBluetoothAdapter;
 
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.RobolectricTestRunner;
@@ -43,50 +39,46 @@
     private static final Uri URI = Uri.parse("content://com.android.settings.slices/test");
 
     private BluetoothUpdateWorker mBluetoothUpdateWorker;
-    private ContentResolver mResolver;
     private Context mContext;
 
     @Before
     public void setUp() {
-        mContext = spy(RuntimeEnvironment.application);
-        mBluetoothUpdateWorker = new BluetoothUpdateWorker(mContext, URI);
-        mResolver = mock(ContentResolver.class);
-        doReturn(mResolver).when(mContext).getContentResolver();
+        mContext = RuntimeEnvironment.getApplication();
+        mBluetoothUpdateWorker = spy(new BluetoothUpdateWorker(mContext, URI));
     }
 
     @Test
     public void onAclConnectionStateChanged_shouldNotifyChange() {
         mBluetoothUpdateWorker.onAclConnectionStateChanged(null, 0);
 
-        verify(mResolver).notifyChange(URI, null);
+        verify(mBluetoothUpdateWorker).notifySliceChange();
     }
 
-    @Ignore("b/315399487")
     @Test
     public void onActiveDeviceChanged_shouldNotifyChange() {
         mBluetoothUpdateWorker.onActiveDeviceChanged(null, 0);
 
-        verify(mResolver).notifyChange(URI, null);
+        verify(mBluetoothUpdateWorker).notifySliceChange();
     }
 
     @Test
     public void onBluetoothStateChanged_shouldNotifyChange() {
         mBluetoothUpdateWorker.onBluetoothStateChanged(0);
 
-        verify(mResolver).notifyChange(URI, null);
+        verify(mBluetoothUpdateWorker).notifySliceChange();
     }
 
     @Test
     public void onConnectionStateChanged_shouldNotifyChange() {
         mBluetoothUpdateWorker.onConnectionStateChanged(null, 0);
 
-        verify(mResolver).notifyChange(URI, null);
+        verify(mBluetoothUpdateWorker).notifySliceChange();
     }
 
     @Test
     public void onProfileConnectionStateChanged_shouldNotifyChange() {
         mBluetoothUpdateWorker.onProfileConnectionStateChanged(null, 0, 0);
 
-        verify(mResolver).notifyChange(URI, null);
+        verify(mBluetoothUpdateWorker).notifySliceChange();
     }
 }
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